Index: moodle/mod/lamslesson/mod_form.php
===================================================================
diff -u -rac9cc783d562d4fd7112b2dff43b34b64dfdedbc -r27da4c0db0ae116bb71ef9ee0a1779841edf0d0c
--- moodle/mod/lamslesson/mod_form.php	(.../mod_form.php)	(revision ac9cc783d562d4fd7112b2dff43b34b64dfdedbc)
+++ moodle/mod/lamslesson/mod_form.php	(.../mod_form.php)	(revision 27da4c0db0ae116bb71ef9ee0a1779841edf0d0c)
@@ -214,6 +214,10 @@
 //-------------------------------------------------------------------------------
 	$this->standard_grading_coursemodule_elements();
 
+	// set the default grade to 'No Grade' so it doesn't record
+	// anything on gradebook unless specifically set.
+	$mform->setDefault('grade', 0);
+
         // add standard elements, common to all modules
         $this->standard_coursemodule_elements();
 //-------------------------------------------------------------------------------